OTHER ANSWERS

I checked your site and indeed see the $66.63 price for the bumper bed. I looked into the database and see that it is set to $55.00. The only thing I noticed was that particular product was the only one I saw with tax data. I am unsure if that has any effect, but you may want to check all tax related settings (geozone, tax rate, etc)

If that is not it, it may be an actual coding bug. You may then want to ask a question in the OpenCart forums to see if anyone else has had this issue and fixed it, or if it has been reported as a bug.

We have an article that lists the locations of different programs' support forums, OpenCart included. You can find that information here.